268 Mr. W. W. Saunders on Pleomorpha. 
XLITI. On Pleomorpha, a Genus of minute Chrysomelide 
from Australia. By W.W.Saunpers, Esq., F.L.S., &e. 
[ Read Ist September, 1845. ] 
> Genus PLromorpHa (aAeoe, poppin). 
Head vertical, nearly circular, with the mandibles more or less 
projecting, immersed in the thorax nearly up to the eyes. Eyes 
oval, elongate, with a slight sinus on the interior margin. An- 
tenne short, not half the length of the body, placed wide apart 
close to the eyes, 11-jointed; 1st joint long, robust, pyriform ; 
2nd, short, turbinate, robust; 3rd—6th, slender, gradually in- 
creasing in length; 7th—10th, broad, triangular, forming with the 
broad terminal ovate joint a long serrated clava, terminal joint 
with a minute knob or accessory joint at the apex. Thorax 
transverse, rounded and gibbous in front, as broad as the elytra, 
with the centre of the hinder margin produced into a very obtuse 
angle posteriorly. Scutellum small, flat, oblong, ovate. Body 
cylindrical, short, abruptly truncate. Hlytra rounded at the apex, 
forming with the thorax a very obtuse oval. Legs robust, the 
anterior pair elongate in the males? Yarsi 4-jointed, 1st, 2nd and 
3rd joints broad, transverse ; the latter deeply bifid, the terminal 
joint cylindrical, clavate. 
This is a genus of small, robust, rounded Chrysomelide, with 
antenne having a distinct and serrated club. The largest species 
which I have seen only reaches 1°, inch in length. The general 
appearance of the species approaches near to the Crytocephali of 
old authors; but looking to the distinctly serrated club of the an- 
tenn, the more or less projecting mandibles, and the elongation of 
the fore legs, I think the true place for it is not far from Clythra. 
Sp. 1. Pleomorpha Davisiit, W. W.S8. (Pl. XV. fig. 4.) 
Head rufous, with the eyes and a transverse line across the 
forehead adjoining the thorax black. Antenne rufous, with the 
joints forming the club black. Thorax rufous, smooth and shining. 
Seutellum black. Elytra smooth, shining, punctato-striate, tes- 
taceous, with the apex broadly tipped with black, a broad margin 
along the base of the same colour, the suture margined with black 
and the punctures near the basal margin black also. Underside 
